Charging pile charging gun power distribution method and system

Abstract

The invention discloses a charging pile charging gun power distribution method and system, and the method comprises the following steps: when charging guns are connected to vehicles and multiple vehicles are charged at the same time, judging whether the situation that the output power of part of the charging guns cannot be satisfied exists, and if the situation exists, executing the step 1; and the control center obtains a distribution scheme enabling the utilization rate of the output power of all the charging modules to be maximum, and redistributes the charging modules to the charging guns. By using the distribution method of the scheme, when multiple vehicles are charged at the same time, the utilization rate of the charging modules is maximized by calling different numbers of charging modules to output power to different charging guns, so that the overall charging capacity of the charging pile is improved.

Description

Technical Field

[0001] This invention belongs to the field of new energy electric vehicle charging technology, and specifically relates to a charging pile charging gun power distribution method and system. Background Technology

[0002] With the development of new energy vehicle battery technology, battery packs can now be charged with higher power and current. In terms of charging methods, in addition to the traditional single-gun interface, dual-gun interface technology has emerged, in which the same BMS controls two sets of charging connectors. Currently, the conventional charging gun output power scheme is as follows: a charging unit can provide a maximum rated output power. This charging unit connects to multiple charging guns, and the total power demand of the multiple charging guns when they are working is at most the rated output power of the charging unit. Within a charging unit, there are several charging modules, each with the same rated output power. The charging modules are connected in series through switches, so that each charging gun can output the power of any number of connected charging modules (e.g., a charging unit has a total of four charging modules, each with an output power of 40kW. Assuming that the charging unit can charge two charging guns, the output power values ​​that a single charging gun can enjoy are 0kW, 40kW, 80kW, 120kW, and 160kW. Note that when two charging guns are used at the same time, a single charging module can only provide power to one charging gun and is disconnected from the other charging guns).

[0003] In existing charging piles, a single charging gun is typically used. When a vehicle is in use, the control center allocates a certain number of charging modules based on the power demand of the vehicle. The conventional allocation method is to allocate the number of charging modules that can meet the power demand of the vehicle being charged by the charging gun that is prioritized. To illustrate with the example mentioned earlier: if the first charging gun requires 90kW of power, then 3 charging modules need to be allocated (total 120kW, utilization rate 90kW / 120kW). However, the second charging gun, regardless of its power demand, can only allocate one charging module, for example, 80kW (total 40kW, utilization rate 40kW / 80kW).

[0004] The applicant discovered in actual use that the power allocation scheme resulted in wasted power utilization. Based on this, the inventor designed a new allocation method to maximize power utilization. Summary of the Invention

[0005] The purpose of this invention is to provide a charging pile charging gun power distribution method and system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, one technical solution adopted by the present invention is: a charging pile power allocation method for charging guns, wherein the charging pile includes a control platform and a charging unit, and the charging unit includes several charging modules; the charging gun power allocation method includes the following steps: S1: The charging gun is connected to the vehicle, and the control platform identifies the battery's power requirements; S2: The control platform determines whether multiple vehicles are being charged. When a single vehicle is being charged, within the maximum output power range, the control platform allocates the power of the charging module that can meet the battery's requirements to work. S3: When multiple vehicles are charging at the same time, determine whether there is a situation where the output power of some charging guns cannot meet the requirements. If such a situation exists, the control center obtains an allocation scheme that maximizes the utilization rate of the output power of all charging modules and reallocates the charging modules to each charging gun. S4: In step S3, if a vehicle leaves fully charged, the control center will re-evaluate whether the charging module can meet the power requirements of the charging gun already in use. If the conditions are met, a charging module that meets the power requirements of each charging gun will be allocated. If not satisfied, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and redistribute the charging modules to each charging gun. S5: In step S3, if a new vehicle is charging, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and reallocate the charging modules to each charging gun.

[0007] Preferably, in step S5, if a new vehicle is being charged using a charging gun, the analysis in step S3 can maximize the utilization rate of the output power of all charging modules. However, this would mean that if the number of charging modules already allocated to a vehicle being charged in step S3 is 0, the original allocation scheme would still be executed, and the newly arrived vehicle would not be charged.

[0008] Preferably, in steps S3-S5, if a charging unit is allocated to any one of at least two charging guns when multiple vehicles are charging simultaneously, the utilization rate of the charging unit is consistent, and the charging unit is allocated to the charging gun of the preceding vehicle according to the vehicle charging sequence.

[0009] Preferably, all charging modules are arranged sequentially and connected end to end. Adjacent charging modules are controlled by a control platform to switch on and off. Each charging gun is directly connected to a charging module through a switch. There is at least one charging module between the charging modules directly connected to adjacent charging guns.

[0010] This solution also provides a charging pile charging gun power distribution system, using the above distribution method, specifically including a control center, a human-machine interaction module, a charging unit, a charging terminal and a charging gun. The control center and the human-machine interaction module are communicatively connected, the control center is communicatively connected to the charging unit, the charging unit and the charging terminal are communicatively connected, and the charging terminal and the charging gun are communicatively connected. The charging module includes several charging modules for outputting a fixed power.

[0011] Preferably, the charging terminal is connected to two charging guns, and there are two charging units, with each charging terminal having two charging guns that are communicatively connected to one charging unit.

[0012] The beneficial effects of this invention are as follows: by using the allocation method of this solution, when multiple vehicles are charging at the same time, by calling different numbers of charging modules to output power to different charging guns, the utilization rate of the charging modules is maximized, thereby improving the overall charging capacity of the charging pile. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating the system usage in this invention; Figure 2 This is a schematic diagram of the communication connection relationship of the system in this invention; Figure 3 This is a schematic diagram of the system structure of Scheme 1 of the present invention; Figure 4 This is a schematic diagram of the system structure of Scheme 2 of the present invention. Detailed Implementation

[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0015] Example: See Figure 1 A charging pile power allocation method for charging guns (illustrated as a "high-power priority" strategy), wherein the charging pile includes a control platform and a charging unit, and the charging unit includes several charging modules; the charging gun power allocation method includes the following steps: S1: The charging gun is connected to the vehicle, and the control platform identifies the battery's power requirements; S2: When charging a single vehicle, within the maximum output power range, the control platform allocates the power of the charging module that can meet the battery's requirements to the charging gun. S3: When multiple vehicles are charging at the same time, determine whether there is a situation where the output power of some charging guns cannot meet the requirements. If such a situation exists, the control center obtains an allocation scheme that maximizes the utilization rate of the output power of all charging modules and reallocates the charging modules to each charging gun. S4: In step S3, if a vehicle leaves fully charged, the control center will re-evaluate whether the charging module can meet the power requirements of the charging gun already in use. If the conditions are met, a charging module that meets the power requirements of each charging gun will be allocated. If not satisfied, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and redistribute the charging modules to each charging gun. S5: In step S3, if a new vehicle is charging, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and reallocate the charging modules to each charging gun.

[0016] In step S5, if a new vehicle is using a charging gun, the analysis in step S3 can maximize the utilization rate of the output power of all charging modules. However, if the number of charging modules allocated to vehicles already being charged in step S3 is 0, the original allocation scheme will still be executed, and the newly arrived vehicle will not be charged. The purpose of setting this step is to prioritize the rights of vehicles that are charged first.

[0017] In steps S3-S5, if multiple vehicles are charging simultaneously and a charging unit is allocated to any one of the two charging guns, the utilization rate of the charging unit is consistent. The charging unit is then allocated to the charging gun of the preceding vehicle according to the vehicle charging order. The purpose of this step is to prioritize the rights of vehicles that charge first.

[0018] In this design, all charging modules are arranged sequentially and connected end to end. The connection between adjacent charging modules is controlled by a control platform. Each charging gun is directly connected to a charging module through a switch. There is at least one charging module between the charging modules directly connected to adjacent charging guns. This design reduces the number of charging modules that a charging gun can call when charging multiple vehicles, but it reduces the number of wiring connections between charging modules and effectively reduces hardware costs.

[0019] This solution also provides a charging pile charging gun power distribution system, using the above distribution method, specifically including a control center, a human-machine interaction module, a charging module, a charging terminal and a charging gun. The control center and the human-machine interaction module are communicatively connected, the control center and the charging module are communicatively connected, the charging module and the charging terminal are communicatively connected, and the charging terminal and the charging gun are communicatively connected. The charging module includes several charging units for outputting a fixed power.

[0020] The charging terminal is connected to two charging guns, and there are two charging units. The two charging guns on each charging terminal are respectively connected to one charging unit.

[0021] See Figure 2 In this system architecture, the control center includes a cloud platform, a main control unit (DTU), and a power control unit (PCU). The cloud platform has an operating program that can implement the charging pile charging gun power allocation method described in this solution. Each charging terminal is equipped with a charging control unit (CCU), which communicates with each charging gun on the charging terminal. When a charging gun is in use, it connects to the vehicle and determines which charging gun to use through a human-machine interface module. The charging control unit uploads the required power of the charging gun to the cloud platform through the power control unit and the main control unit. The cloud platform then issues instructions to the main control unit (DTU) based on the control module's usage plan. The main control unit (DTU) then issues instructions to the power control unit (PCU) to execute the switching on and off of different charging modules.

[0022] The main control board and the cloud platform communicate via 4G / TCPIP, the human-machine interaction module and the main control board communicate via TTL, and the main control board and the power control board, the power control board and the charging unit, and the power control board and the charging board communicate via CAN bus.

[0023] The following will illustrate the allocation method mentioned in this plan with specific examples: Option 1: See Figure 3This embodiment includes a charging stack with two charging units, each with four charging modules (ACDC), each module having a power granularity of 40kW, and two charging terminals, for a total maximum charging power of 320kW. It is suitable for areas with limited power capacity and primarily for single-gun charging of ordinary household new energy vehicles. Under this scheme, the maximum power of single-gun charging is 160kW, and the maximum power of dual-gun charging is 320kW. Taking multiple vehicles charging simultaneously with a single gun as an example, when all vehicles are charging with a single gun, guns A and C share charging unit 1, totaling 160kW, while guns B and D share charging unit 2, also totaling 160kW. Gun A starts charging first, with a battery power requirement of 50kW. At this time, ACDC1 and ACDC2 start, contactors KM1 and KMA engage, each outputting 25kW to meet the vehicle's battery pack requirements. Then, gun B starts, with a battery power requirement of 70kW. At this time, ACDC5 and ACDC6 start, contactors KM11 and KMB engage, each outputting 35kW to meet the vehicle's battery pack requirements. Next, charging gun C starts, requiring 120kW of power from the battery. At this time, ACCDC3 and ACCDC4 start, and contactors KM3 and KMC engage, each outputting 40kW, which is insufficient to meet the battery pack's power requirements. Then, charging gun D starts, requiring 90kW of power from the battery. ACCDC7 and ACCDC8 start, and contactors KM13 and KMD engage, each outputting 40kW, still insufficient to meet the battery pack's power requirements. The control center uses the allocation method mentioned in this solution to monitor charging units 1 and 2. In charging unit 1, charging gun C still needs 40kW, but the two modules occupied by charging gun A only output 50kW, leaving 30kW unused. Charging gun A then releases ACCDC2, disconnects KM1, and then switches ACCDC2 to charging gun C, engaging KM2. At this time, ACCDC1 outputs 40kW to charging gun A, and ACCDC2, ACCDC3, and ACCDC4 all output 40kW to charging gun C. The module utilization rate of charging unit 1 reaches 100%. %%; In charging unit 2, D gun still needs 10kW. If B gun releases ACCDC6 to D gun, then B gun releases ACCDC6, ACCDC5 outputs 40kW to B gun, and ACCDC6, ACCDC7, and ACCDC8 each output 30kW to D gun. At this time, the total output power of charging module unit 2 is 130kW, which is less than the previous 150kW. Therefore, charging unit 2 maintains its original output state without adjusting the power distribution. After the power adjustment of charging unit 1 is completed, the total power utilization rate of the charging pile increases by 9.37%.

[0024] Option 2: See Figure 4Another embodiment of this invention includes a charging stack with two charging units, each charging unit having 10 charging modules, each charging module having a power granularity of 60kW, and a total of 5 charging terminals, achieving a maximum charging power of 1200kW. This is suitable for applications primarily involving dual-gun parallel charging of large heavy-duty trucks. Under this scheme, the maximum power of single-gun charging is 600kW, and the maximum power of dual-gun parallel charging is 1200kW. Taking simultaneous dual-gun charging of multiple vehicles as an example, charging terminal 1 starts charging with both guns simultaneously, requiring a battery power of 220kW. At this time, ACCDC1 and ACCDC2 output to gun A, and ACCDC11 and ACCDC12 output to gun B. Contactors KM1, KM11, KMA, and KMB are engaged, each outputting 55kW to meet the vehicle's battery pack requirements. Charging terminal 2 then starts charging with both guns simultaneously, requiring a battery power of 480kW. At this time, ACCDC3, ACCDC4, ACCDC5, and ACCDC6 output to gun C, and contactors KM3, KM4, KM5, and KMC are engaged. ACCDC13, ACCDC14, ACCDC15, and ACCDC16 output to gun D, ​​and contactors KM13, KM14, KM15, and KMD are engaged. All charging modules output 60kW to meet the vehicle's battery requirements. The battery pack requires 250kW of power. Next, charging terminal 5 is activated with both charging guns running concurrently. At this point, ACCDC8, ACCDC9, and ACCDC10 output to gun I, and contactors KM8, KM9, and KMI are engaged. ACCDC18, ACCDC19, and ACCDC20 output to gun J, and contactors KM18, KM19, and KMJ are engaged. All charging modules output 41.67kW, meeting the battery pack's power requirements. Finally, charging terminal 4 is activated with both charging guns running concurrently, requiring 240kW of power. At this point, only ACCDC7 and ACCDC17 remain idle in the two charging units. After activation, ACCDC7 outputs to gun G, and ACCDC14 outputs to gun H. Contactors KMG and KMH are engaged, and both charging modules output 60kW, which is insufficient to meet the battery pack's power requirements.After multiple vehicles started charging simultaneously, the control center began polling and monitoring the controlled charging units. At this time, the output power of charging terminal 4 was 120kW less than the power required by the battery pack. Since modules ACDC7 and ACDC17 directly outputting from guns G and H, and modules ACDC6 and ACDC16 to the left of them, were already at full power output, they did not need to participate in power allocation adjustment. However, modules ACDC8 and ACDC18 to the right were not operating at full power. After being released from terminal 5, their output to terminal 4 filled the 120kW difference between the output power and the required power of terminal 4. At the same time, ACDC8 and ACDC18 could be upgraded to full power of 60kW. After being released, charging terminal 5 had four charging modules remaining, with a required power of 250kW. The remaining four charging modules also operated at full power of 60kW. Thus, the system completed this round of allocation adjustment. At this time, the total power output of the charging pile was 1180kW, compared to 1070kW before the adjustment. The power utilization rate of the entire charging pile system increased by 9.17% compared to before the adjustment. The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for power distribution of a charging pile charging gun, characterized in that: The charging pile includes a control platform and a charging unit, the charging unit including several charging modules; the charging gun power distribution method includes the following steps: S1: The charging gun is connected to the vehicle, and the control platform identifies the battery's power requirements; S2: When charging a single vehicle, within the maximum output power range, the control platform allocates the power of the charging module that can meet the battery's requirements to the charging gun. S3: When multiple vehicles are charging at the same time, determine whether there is a situation where the output power of some charging guns cannot meet the requirements. If such a situation exists, the control center obtains an allocation scheme that maximizes the utilization rate of the output power of all charging modules and reallocates the charging modules to each charging gun. S4: In step S3, if a vehicle leaves fully charged, the control center will re-evaluate whether the charging module can meet the power requirements of the charging gun already in use. If the conditions are met, a charging module that meets the power requirements of each charging gun will be allocated. If not satisfied, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and redistribute the charging modules to each charging gun. S5: In step S3, if a new vehicle is charging, re-analyze the allocation scheme that maximizes the output power utilization of all charging modules according to step S3, and reallocate the charging modules to each charging gun.

2. The charging gun power distribution method for a charging pile according to claim 1, characterized in that: In step S5, if a new vehicle is using a charging gun, the analysis in step S3 can maximize the utilization of the output power of all charging modules. However, if the number of charging modules allocated to a vehicle that is already being charged in step S3 is 0, the original allocation scheme will still be executed, and the newly arrived vehicle will not be charged.

3. The charging gun power distribution method for a charging pile according to claim 1, characterized in that: In steps S3-S5, if multiple vehicles are charging simultaneously, and a charging unit is allocated to any one of at least two charging guns, the utilization rate of that charging unit is consistent, and the charging unit is allocated to the charging gun of the preceding vehicle according to the vehicle charging sequence.

4. The charging gun power distribution method for a charging pile according to claim 1, characterized in that: All charging modules are arranged sequentially and connected end to end. Adjacent charging modules are controlled by a control platform to switch on and off. Each charging gun is directly connected to a charging module through a switch. There is at least one charging module between the charging modules directly connected to adjacent charging guns. The rated output power of each charging module is the same.

5. A charging pile charging gun power distribution system, characterized by the features described in any one of claims 1-4: It includes a control center, a human-machine interaction module, a charging unit, a charging terminal, and a charging gun. The control center and the human-machine interaction module are communicatively connected. The control center is communicatively connected to the charging unit. The charging unit and the charging terminal are communicatively connected. The charging terminal and the charging gun are communicatively connected. The charging unit includes several charging modules for outputting a fixed power.

6. The charging pile charging gun power distribution system according to claim 4, characterized in that: The charging terminal is connected to two charging guns, and there are two charging units. The two charging guns on each charging terminal are respectively connected to one charging unit.

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